Car-truck.



No. 706,585. Patented Aug. I2, |902.

G. C.` MURRAY.

CAR TRUCK. (Appl icltion led mr. 11. 1902.)

2 shank-snm A (No Model.)

Willi! No. 706,585. -Pammd Aug. l2, 1902.

l G. c. MURRAY;

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A (Application led Mar. 11 1902.) (No Model.) n 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

GEoRGE cj MURRAY, ror cIIIcAGo, ILLINOIS.

cAR-TRUCK..

SPECIFICATION forming part of ALetters Patent No. 706,585, dated August 12, 1902. Application filed Maroh11,19`02. Serial No. 97,739.4 (,No model.)

To all whom, it may concern: A,

Be it known that I, GEORGE C. MURRAY, a citizen of the United States, residing at Chicago, in the county of (look and State of Illinois, have invented certain new andV useful Improvements in Car-Trucks, of which 'theV following is a specification.

This invention relates to that classof cartrucks which is used in connection with rail- Waycars,and particularly to the arrangement and disposition of the swinging spring-seats by which the lurching movements of the ends of the car and the endwise movement of the bolster may take place without racking or destroying any of the parts, all of which will be more fully hereinafter set forth.

The principal object of the invention is to provide a simple, economical, and eflicient car-truck with rocking devices by which the car-bolster may be efficiently held in position.

The invention consists principally in a cartruck in which there are combined transom or bolster columns, a bolster movably mounted between the same, a spring-seat, and a plurality of rocking devices arranged 'directly' under the spring-seat and pivotally connected therewith for holding the same in position.l

The invention consists, further, in a cartruck in which there are combined the'usual bolster or transom columns connected by and with the usual arch-bars, a bolster endwise movably mounted between the same,a springseat, a plurality of rockers pivotally connected to the spring-seat directly under the same and arranged to contact the same and permit a limited movement only thereof, and spring mechanism mounted between the spring-seat and the bolster.

The invention consists, further and nally, in the features, combinations, and details of construction hereinafter described and claimed.-

In the accompanying drawings, Figure lis a side elevation of a car-truck constructed in accordance with these improvements; Fig. 2, asectional elevation of aportion of the mechanism, taken onl line 2 of Fig. l looking in the direction of the arrow; and Fig. 3, a plan sectional view taken on line 3 of Fig. 4.

In the art to which this invention relates itis well known that the bolster of a car when taking a curve, particularly when there is little or no flexure to the body of the car, in order to accommodate itself to the different positions assumed by the body of the car incident to the lurching thereof is forced from side to side or en dwise of thebolster, so as to displace theparts.- If no mechanism is provided for the compensation of 'this lurching of the usual members of the car construction, the endwise thrust on the bolster and parts with which it` is engaged is apt to result in the rapid wear, if not destruction, of some of these parts. The principal object of this inventiomtherefore, is to ,provide a truck of such construction and arrangelneutthat the car-bolster has a limited rocking movement, and, further, so constructed as regards the details thereof that there isa tendency for thel parts to resume their normal position when the car is running in its usual vor ordinary manner, all of which will `more fully hereinafter appear. In constructinga truck in accordance with these improvementsplone which is provided with the usual supporting car-wheels Ct and upper and lower'archfb'ars b and c-I provide a pair of transom` or bolster columns d and secure them to and `between such arch-bars, all inthe usualmauner, `I next provide a carbolster of any desired construction, having vertical safety-lian ges f on each side at or near the ends thereon-'termin g channels which are slightly wider than the bolster-cola mns. This construction'permits alimited amountof end- Wise motion of the bolster. The flanges and grooves are not necessary in this construction, as part of the invention is to provide means by which these vertical flanges may he dispensed with, all of which will more fully hereinafter appear, but may be used as a factor of safety in case the other devices fail to act or become worn.

In order to provide for a rocking'audyield'-` ing motion of the bolster in the desired manner, I make spring-plates gand arrange thefmf under the ends of the bolster and between Intermediate the ends IOO toothed, as shown in Fig. 2, and pivotallyv connected with such spring-plates and rockingly mounted on such platforms are a plurality of rockers j, the curves of which are struck from a radii greater than the distance to the pivotal point. These rockers, as shown, are inclined vor curved each way and downwardly from the pivotal points, so as to provide heeled ends 7c, which when the limit of rocking motion is reached strike against the under side of the spring-plates and prevent further endwise as well as rocking movement of the parts. It will be seen, therefore, that the rockers form stops aswell as rockers and,as hereinbefore suggested,may be used in place of the vertical flanges on the bolster ends. The pivotal connections between the rockers and the spring-plates are formed by means of shafts Z, which are forced through perforations in both parts.

I claim- 1. In a car-truck of the class described, the

. combination of bolsters or transom-columns,

a bolster movably mounted between the same, a spring-plate under each end of the bolster and between the bolster-columns, a platform arranged between the lower ends of such columns under each spring-plate, a plurality of rockersv extending parallel with each other transversely of the car arranged directly under and attached to the spring-plates supporting the same and supported on the platform, and spring mechanism interposed between the bolsters and the spring-plates, su bstantially as described.

2. In a car-truck of the class described, the combination of bolsters or transom-columns, a bolster mounted between the saule,spring plates under the ends of the bolsters and between the bolster-columns, a toothed platform arranged between the lower ends of each pair of bolster-columns in xed relation thereto, toothed rockers extending transversely of the car arranged directly under and pivotally attached tol the spring-plate and supported on the toothed platform, and spring mechanism between the bolsters and the spring-plates and means for stopping the rocking movement of the rockers and thereby the end thrust of the bolster, substantially as described.

3. In a car-truck of thevclass described, the combination of bolsters or transom-columns, a bolster movably mounted between the same, spring-plates under each end of the bolsters and between the bolster columns, spring mechanism between the bolsters and the spring-plates, platforms arranged underneath thespring-plates and between the bolstercolumns, and rocker mechanism pivotally connected to the spring-plates mounted upon the platforms and provided with heeled ends which act as stops, substantially as described.

4. In a car-truck of the class described, the combination of bolsters or transom-columns, a bolster movably mounted between the same, spring-plates under each end of the bolster and between the bolster columns, spring mechanism between the bolster and the spring-plates, a toothed platform under each spring-seat arranged between the lower ends of the bolster-colo mns, and aplurality of elongated toothed rockers pivotally connected with the under side of the spring-plates to rockingly support the same and act as stops to the movement thereof, substantially as described.

5. In a car-truck of the class described, the combination of bolsters or transom-columns,- a bolster movably mounted between the same, spring-plates under each end of the bolster and between the bolster columns, spring mechanism between the bolster and the spring-plates, a toothed platform under each,

spring-seat arranged between the lower ends of the bolster-columns,a plurality of elongated toothed rockers pivotally connected with the under side of the spring-plates to rockingly support the same and act as stops to the movement thereof, and shafts for pivotally connecting the spring-plates and rockers together', substantially as described.

" GEORGE C. MURRAY.

Witnesses:

THOMAS F. SHERIDAN, HARRY IRWIN CROMER. 

